MONDEJAR Wastewater Treatment Plant, Mondéjar, Castilla-La Mancha, Spain

The MONDEJAR wastewater treatment plant is located in Mondéjar, a municipality in the province of Guadalajara, Castilla-La Mancha, Spain. The facility serves a population of approximately 4,500 people, classifying it as a small agglomeration under EU classification. As a Spanish plant, it operates under the EU Urban Waste Water Treatment Directive 91/271/EEC, which requires secondary treatment for agglomerations of this size discharging into freshwater. The regulatory framework ensures compliance with national and European standards for effluent quality. The plant's treated effluent is discharged into local watercourses that ultimately drain into the Tagus River basin, a major Iberian river system. The Tagus River flows westward through Spain and Portugal, supporting diverse aquatic ecosystems and providing water for agriculture and urban use before reaching the Atlantic Ocean near Lisbon.

The plant discharges into the Tagus River basin, which flows through central Spain and Portugal to the Atlantic Ocean. The Tagus supports diverse aquatic life, including endemic fish species, and is an important migratory corridor for birds. Downstream ecosystems rely on adequate treatment to prevent nutrient enrichment and maintain water quality.